Crystalline lithium aluminates
AssigneeThe Dow Chemical Company
InventorJohn L. Burba, III
Life of this patent
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Abstract
Crystalline hydrous aluminas, Al(OH).sub.3, are reacted with LiX, where X is anion, under appropriate conditions to prepare crystalline compounds conforming substantially to the empirical formula LiX.2Al(OH).sub.3.nH.sub.2 O where X is anion and nH.sub.2 O represents waters of hydration. Depending on the beginning hydrous alumina, some of the crystalline compounds are of a novel 2-layer unit cell structure and some of a 3-layer unit cell structure.
Claims14
A process whereby crystalline hydrous alumina is converted to crystalline LiX.2Al(OH).sub.3.nH.sub.2 O, where nH.sub.2 O indicates waters of hydration, and
- where X indicates anions which will form acids when in molecular combination with hydrogen or will form salts when in molecular combination with metal ions,
- said process comprising reacting the said alumina with a concentrated solution of LiX at an elevated temperature of at least about 85.degree. C.
A composition of matter comprising crystalline LiX.2Al(OH).sub.3.nH.sub.2 O, where nH.sub.2 O represents waters of hydration, X indicates anions which will form acids when in molecular combination with hydrogen or will form salts when in molecular combination with metal ions, said crystalline composition being of the 2-layer unit cell variety.
A composition of matter comprising crystalline LiOH.2Al(OH).sub.3 nH.sub.2 O, where nH.sub.2 O represents waters of hydration, said crystalline composition being of the 2-layer unit cell variety.
Dependencies are inferred from the claim text.